Brain Basics: Understanding Sleep

The Melatonin then return back to Serotonin. The whole cycle of this serotonin-Melatonin-Serotonin cycle takes about 24 hours. This hormone cycle is treated as the body clock. This 24 hour body clock sets the body chemistry for sleeping and waking. Along with Serotonin, the Stress fighting hormone Cortisol plays an important role to make the ... ................
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